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Skip Montanaroe5d7f7f2002-09-20 14:16:59 +00001+++++++++++
2Python News
3+++++++++++
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Anthony Baxterb0c66302004-11-04 05:23:17 +00005(editors: check NEWS.help for information about editing NEWS using ReST.)
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Guido van Rossum45aecf42006-03-15 04:58:47 +00007What's New in Python 3000?
8==========================
Thomas Wouters4d70c3d2006-06-08 14:42:34 +00009
Neal Norwitz4886cc32006-08-21 17:06:07 +000010*Release date: XX-XXX-200X*
11
12TO DO
13-----
14
Georg Brandl66a796e2006-12-19 20:50:34 +000015- See PEP 3000, 3100.
Neal Norwitz4886cc32006-08-21 17:06:07 +000016
Neal Norwitz4886cc32006-08-21 17:06:07 +000017- Weed really old/weird stuff from the library.
18
19- Unify range() and xrange().
20
Neal Norwitz4886cc32006-08-21 17:06:07 +000021- Rework the standard I/O library to use bytes for binary files.
22
23- Make strings all Unicode.
24
Neal Norwitz4886cc32006-08-21 17:06:07 +000025- Get rid of various compatibility-related flags (e.g. division flags).
26
Neal Norwitz378b2c92006-08-29 07:57:22 +000027
Neal Norwitz4886cc32006-08-21 17:06:07 +000028Core and Builtins
29-----------------
30
Neal Norwitz2633c692007-02-26 22:22:47 +000031- Remove the exceptions module, all the exceptions are already builtin.
32
Guido van Rossum0240b922007-02-26 21:23:50 +000033- input() becomes raw_input(): the name input() now implements the
34 functionality formerly known as raw_input(); the name raw_input()
35 is no longer defined.
36
Brett Cannon39590462007-02-26 22:01:14 +000037- Classes listed in an 'except' clause must inherit from BaseException.
Brett Cannonf74225d2007-02-26 21:10:16 +000038
Guido van Rossumcc2b0162007-02-11 06:12:03 +000039- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
40 and .keys(), .items(), .values() return dict views.
41
Guido van Rossum8b545362007-02-09 23:52:14 +000042- PEP 3105: print is now a function. Also (not in the PEP) the
43 'softspace' attribute of files is now gone (since print() doesn't use
44 it). A side effect of this change is that you can get incomplete
45 output lines in interactive sessions:
46
47 >>> print(42, end="")
48 42>>>
49
50 We may be able to fix this after the I/O library rewrite.
Guido van Rossum4502c802007-02-09 05:42:38 +000051
Brett Cannon398db8b2007-01-29 23:44:37 +000052- PEP 3102: keyword-only arguments.
53
Guido van Rossumd4588c12007-02-13 19:55:23 +000054- Int/Long unification is complete. The 'long' built-in type
Guido van Rossumec7027f2007-01-30 00:00:40 +000055 and literals with trailing 'L' or 'l' have been removed.
56 Performance may be sub-optimal (haven't really benchmarked).
Guido van Rossumab186842007-01-14 03:42:30 +000057
58- 'except E, V' must now be spelled as 'except E as V' and deletes V
59 at the end of the except clause; V must be a simple name.
60
Neal Norwitzc1505362006-12-28 06:47:50 +000061- Added function annotations per PEP 3107.
62
Georg Brandl66a796e2006-12-19 20:50:34 +000063- Moved intern() to sys.intern().
64
65- exec is now a function.
66
67- Renamed nb_nonzero to nb_bool and __nonzero__ to __bool__.
Jack Diederich4dafcc42006-11-28 19:15:13 +000068
Neal Norwitz4886cc32006-08-21 17:06:07 +000069- Classic classes are a thing of the past. All classes are new style.
70
71- Exceptions *must* derive from BaseException.
72
73- Integer division always returns a float. The -Q option is no more.
74 All the following are gone:
75 * PyNumber_Divide and PyNumber_InPlaceDivide
76 * __div__, __rdiv__, and __idiv__
77 * nb_divide, nb_inplace_divide
78 * operator.div, operator.idiv, operator.__div__, operator.__idiv__
79 (Only __truediv__ and __floordiv__ remain, not sure how to handle them
80 if we want to re-use __div__ and friends. If we do, it will make
81 it harder to write code for both 2.x and 3.x.)
82
83- 'as' and 'with' are keywords.
84
85- Absolute import is the default behavior for 'import foo' etc.
86
Neal Norwitz378b2c92006-08-29 07:57:22 +000087- Removed support for syntax:
88 backticks (`x`), <>
89
Neal Norwitz4886cc32006-08-21 17:06:07 +000090- Removed these Python builtins:
Neal Norwitz81fe3412007-02-26 21:42:55 +000091 apply(), coerce()
Neal Norwitz4886cc32006-08-21 17:06:07 +000092
Neal Norwitz378b2c92006-08-29 07:57:22 +000093- Removed these Python methods:
94 {}.has_key
95
Neal Norwitz4886cc32006-08-21 17:06:07 +000096- Removed these Python slots:
97 __coerce__, __div__, __idiv__, __rdiv__
98
99- Removed these attributes from Python modules:
100 * operator module: div, idiv, __div__, __idiv__
101
Neal Norwitz4886cc32006-08-21 17:06:07 +0000102- Removed these C APIs:
Neal Norwitz378b2c92006-08-29 07:57:22 +0000103 PyNumber_Coerce(), PyNumber_CoerceEx()
Neal Norwitz4886cc32006-08-21 17:06:07 +0000104
105- Removed these C slots/fields:
106 nb_divide, nb_inplace_divide
107
108- Removed these macros:
109 staticforward, statichere, PyArg_GetInt, PyArg_NoArgs
110
111- Removed these typedefs:
112 intargfunc, intintargfunc, intobjargproc, intintobjargproc,
113 getreadbufferproc, getwritebufferproc, getsegcountproc, getcharbufferproc
114
115- Removed these opcodes:
Neal Norwitz378b2c92006-08-29 07:57:22 +0000116 BINARY_DIVIDE, INPLACE_DIVIDE, UNARY_CONVERT
117
118- zip returns an iterator
119
120- Additions:
Georg Brandl66a796e2006-12-19 20:50:34 +0000121 set literals, ellipsis literal
Neal Norwitz378b2c92006-08-29 07:57:22 +0000122
Neal Norwitz4886cc32006-08-21 17:06:07 +0000123
124Extension Modules
125-----------------
126
127Library
128-------
129
Guido van Rossum893523e2007-01-10 01:29:06 +0000130- Removed all traces of the sets module.
131
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000132Build
133-----
134
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000135C API
136-----
137
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000138Tests
139-----
140
Brett Cannonced04e02005-02-13 22:53:22 +0000141Documentation
142-------------
143
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000144Mac
145---
146
Hye-Shik Chang4e422812005-07-17 02:36:59 +0000147New platforms
148-------------
149
Raymond Hettinger4901a1f2004-12-02 08:59:14 +0000150Tools/Demos
151-----------
152
Skip Montanaroe5d7f7f2002-09-20 14:16:59 +0000153**(For information about older versions, consult the HISTORY file.)**